Which ports can/should we use for step 5 for hosting a bridge?

Step 5 on the Bridge Guide instructs to

Replace "TODO1" with a Tor port of your choice. This port must be externally reachable.

but I don’t know which ports are even an option or what the benefits/cons are of using some over others. Can someone provide some guidance, please?

I think it is ok to just select random number between 1 and 65535.

I came across these details on port designations on Google IT Support Professional Certificate so I think there may be some distinction of better ports after all:

"* Given the number of ports available, they have been divided into three categories by the Internet Assigned Numbers Authority (IANA): System Ports, User Ports, and Ephemeral Ports.

  • System Ports: Identified as ports 1 through 1023. System ports are reserved for common applications like FTP (port 21) and Telnet over TLS/SSL (port 992). Many still are not assigned. Note: Modern operating systems do not use system ports for outbound traffic.

  • User Ports: Identified as ports 1024 through 49151. Vendors register user ports for their specific server applications. The IANA has officially registered some but not all of them.

  • Ephemeral Ports (Dynamic or Private Ports): Identified as ports 49152 through 65535. Ephemeral ports are used as temporary ports for private transfers. Only clients use ephemeral ports.

  • Not all operating systems follow the port recommendations of the IANA, but the IANA registry of assigned port numbers is the most reliable for determining how a specific port is being used. You can access the IANA Service Name and Transport Protocol Port Number Registry here or check out this helpful list of commonly used ports."